How to Check Battery Degradation Status

We have received many inquiries regarding how to interpret battery degradation status, so we would like to clarify as follows:

• “Current Battery Capacity” is calculated using a conservative method and reflects the minimum usable capacity of the battery.

• “Current Battery Capacity (Alternative Method)” is based on a more optimistic estimation, indicating the maximum possible capacity.

As previously explained, battery degradation is generally a predicted value, and actual measurement is only feasible under very specific conditions. Due to this nature, the two capacity values tend to converge over time.If there is a lack of early charging data, the difference between the two values can be significant. In such cases, please interpret them as:• Minimum capacity → “Current Battery Capacity”• Maximum capacity → “Current Battery Capacity (Alternative Method)”

Additionally, the “Maximum Capacity” represents the theoretical maximum pack capacity of the vehicle and can only be measured for new vehicles (those with low mileage and short usage duration). For vehicles that have been driven longer, this value is estimated using internal statistical models or data from similar vehicles.

Accordingly, please refer to the two following types of SOH (State of Health) indicators: • Current SOH = Current Capacity / Initial Capacity• SOH based on Max Capacity = Current Capacity / Maximum Capacity

In the case of new vehicles, if the maximum capacity has been measured, the SOH based on that value can more accurately reflect degradation.However, if your vehicle came with a battery that performs better than the manufacturer’s specification, you may feel that degradation is happening faster than expected. Therefore, it is recommended to refer to “Current SOH” in such situations.

Recently, in response to feedback that the diagnostic results were too conservative, we have changed the default basis for battery health diagnostics to “Current SOH (Alternative Method)”.Other related diagnostic indicators have also been updated accordingly.

Lastly, for new vehicles, degradation trends cannot yet be fully captured by the algorithm, so the accuracy of “Remaining Driving Range” may be lower. This improves over time as mileage and usage increase.

If your SOH value has recently increased significantly, it is likely due to our adjustment of the initial capacity values. We have revised these values based on our collected data and internal statistics, generally setting initial capacity slightly lower than before for certain models.